By Joe Doran There are currently nearly half a million people worldwide who are living past the age of 100. And the 21st century will almost certainly push the boundary of extreme longevity. That’s according to a new study by the University of Washington. The new study, which was published in Demographic Research on June 30th, looks at the extremes of human life using statistical modeling. Currently, “supercentenarians,” or people who live to age 110 or longer, remain very rare. The oldest recorded living person, Jeanne Calment of France, was 122 when she died in 1997. At the moment, the world...